Diagnostic Aids

Intermittent faults must be continuously present for at least 20 seconds to cause Code 26 to set. QDM controlled circuits should be inspected for poor terminal contact and damaged harness. QDM faults can be detected as previously described and when outputs are on or off as follows:

• Open circuit or control circuit short to ground, output commanded off.
• Shorted device or control circuit short to voltage, output commanded on.

Fig 1: Code 26, Schematic, Quad-Driver Error, "L" Body

Fig 2: Code 26, Flow Chart (1 of 3), Quad-Driver Error, "L" Body

Fig 3: Code 26 - 1 of 3

Fig 4: Code 26, Flow Chart (2 of 3), Quad-Driver Error, "L" Body

Fig 5: Code 26 - 2 of 3

Fig 6: Code 26, Flow Chart (3 of 3), Quad-Driver Error, "L" Body

Fig 7: Code 26 - 3 of 3